qcacmn: Control the size of the freq and chan_num (QDF)

Depending on the requirement, a bigger size or a smaller size for
the frequency variable can be chosen. The advantages of each size
are described below:

Advantage of a bigger size:
When two technologies (e.g. 802.11AX and 802.11AD) are controlled
by the same driver software, the frequency range may be very large
and a bigger size (e.g. 32bit integer) is more appropriate.

Advantage of a smaller size:
When the frequency range is not very large, a smaller size
(e.g. 16bit integer) can be used. It saves a large amount of space
especially when many large arrays containing elements of this
type/size are defined in the driver.

Change-Id: I6c8fb2a4dc117e2535ef96009362923557cee398
CRs-Fixed: 2570456

qdf/inc/qdf_types.h

@@ -104,6 +104,15 @@ typedef void *qdf_pm_t;
  */
 typedef void *qdf_handle_t;
 
+/**
+ * typedef qdf_freq_t - define frequency as a 16 bit/32 bit
+ * unsigned integer depending on the requirement
+ */
+#ifdef CONFIG_16_BIT_FREQ_TYPE
+typedef uint16_t qdf_freq_t;
+#else
+typedef uint32_t qdf_freq_t;
+#endif
 /**
  * typedef qdf_device_t - Platform/bus generic handle.
  * Used for bus specific functions.